:root {
  --primary: #e30613;
  --secondary: #111111;
  --accent: #111111;
  --background: #f5f5f5;
  --surface: #ffffff;
  --foreground: #111111;
  --muted: #e5e5e5;
  --border: #d4d4d4;
  --destructive: #e30613;
  --success: #0a7a3e;
  --warning: #c47a00;

  --font-heading: "Space Grotesk", system-ui, sans-serif;
  --font-body: "Inter", system-ui, sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--background);
  color: var(--foreground);
  font-family: var(--font-body);
  font-weight: 400;
  line-height: normal;
}

.page-grid {
  display: grid;
  grid-template-columns: 12px 1fr;
  min-height: 100vh;
}

.rail {
  background: var(--secondary);
  border-right: 1px solid var(--border);
}

.rail-mark {
  display: block;
  width: 100%;
  height: 72px;
  background: var(--primary);
}

.main {
  max-width: 640px;
  padding: 48px 32px 64px;
}

.page-header {
  margin-bottom: 32px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border);
}

.kicker {
  margin: 0 0 8px;
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--foreground);
}

.page-header h1 {
  margin: 0 0 12px;
  font-family: var(--font-heading);
  font-size: 40px;
  font-weight: 600;
  line-height: 1.05;
  letter-spacing: -0.02em;
}

.lede {
  margin: 0;
  max-width: 36ch;
  font-size: 16px;
  color: var(--foreground);
}

.surface {
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 24px;
  margin-bottom: 24px;
}

.surface-head {
  margin-bottom: 20px;
}

.surface-head h2 {
  margin: 0 0 8px;
  font-family: var(--font-heading);
  font-size: 20px;
  font-weight: 600;
}

.surface-desc {
  margin: 0;
  font-size: 14px;
  color: var(--foreground);
}

.surface-desc strong {
  font-weight: 600;
}

.upload-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
}

.fine-print {
  margin: 16px 0 0;
  font-size: 12px;
  color: var(--foreground);
  opacity: 0.75;
}

.hidden {
  display: none !important;
}

.stack {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.alert {
  padding: 12px 16px;
  margin-bottom: 24px;
  border: 1px solid var(--border);
  background: var(--surface);
  font-size: 14px;
}

.alert.error {
  border-color: var(--destructive);
  border-left-width: 4px;
  border-left-color: var(--destructive);
}

.alert.success {
  border-color: var(--success);
  border-left-width: 4px;
  border-left-color: var(--success);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 20px;
  border: 1px solid transparent;
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 500;
  line-height: normal;
  cursor: pointer;
  background: none;
}

.btn-primary {
  background: var(--primary);
  border-color: var(--primary);
  color: var(--surface);
}

.btn-primary:hover {
  background: var(--secondary);
  border-color: var(--secondary);
}

.btn-secondary {
  background: var(--surface);
  border-color: var(--foreground);
  color: var(--foreground);
}

.btn-secondary:hover {
  background: var(--muted);
}

.tabs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  margin-bottom: 20px;
  border: 1px solid var(--border);
}

.tab {
  padding: 10px 12px;
  border: none;
  border-right: 1px solid var(--border);
  background: var(--background);
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  color: var(--foreground);
}

.tab:last-child {
  border-right: none;
}

.tab.active {
  background: var(--surface);
  box-shadow: inset 0 -2px 0 var(--primary);
}

.panel {
  margin-top: 4px;
}

.passkey-settings {
  margin-bottom: 24px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border);
}

.passkey-settings h3 {
  margin: 0 0 8px;
  font-family: var(--font-heading);
  font-size: 14px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.btn-text {
  padding: 4px 0;
  color: var(--foreground);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.btn-text:hover {
  color: var(--primary);
}

label {
  display: block;
  margin-bottom: 8px;
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

input[type="text"] {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--foreground);
  font-family: var(--font-body);
  font-size: 13px;
}

input[type="text"]:focus {
  outline: 2px solid var(--foreground);
  outline-offset: 0;
}

.dropzone {
  display: grid;
  gap: 4px;
  padding: 40px 24px;
  text-align: center;
  border: 1px dashed var(--border);
  background: var(--background);
  cursor: pointer;
}

.dropzone:focus {
  outline: 2px solid var(--foreground);
  outline-offset: 2px;
}

.dropzone.dragover {
  border-color: var(--primary);
  background: var(--muted);
}

.dropzone-label {
  font-family: var(--font-heading);
  font-size: 18px;
  font-weight: 500;
}

.dropzone-or {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--foreground);
  opacity: 0.6;
}

.dropzone-action {
  font-size: 14px;
  font-weight: 500;
  color: var(--primary);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.result {
  margin-top: 24px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}

.result-title {
  margin: 0 0 20px;
  font-family: var(--font-heading);
  font-size: 16px;
  font-weight: 600;
  color: var(--success);
}

.link-block {
  margin-bottom: 16px;
}

.link-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 8px;
  align-items: stretch;
}

.link-row .btn {
  white-space: nowrap;
}

.workspace-tabs {
  margin-bottom: 24px;
}

.workspace-panel {
  margin-top: 4px;
}

.pdf-library {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  border-top: 1px solid var(--border);
}

.pdf-library li {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 12px 16px;
  align-items: center;
  padding: 16px 0;
  border-bottom: 1px solid var(--border);
}

.pdf-item-main {
  min-width: 0;
}

.pdf-item-name {
  margin: 0 0 4px;
  font-family: var(--font-heading);
  font-size: 15px;
  font-weight: 500;
  word-break: break-word;
}

.pdf-item-meta {
  margin: 0;
  font-size: 12px;
  opacity: 0.75;
}

.pdf-item-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: flex-end;
}

.pdf-item-actions .btn {
  padding: 8px 12px;
  font-size: 12px;
}

.btn-ghost {
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--foreground);
}

.btn-ghost:hover {
  border-color: var(--foreground);
}

.page-footer {
  padding-top: 16px;
  border-top: 1px solid var(--border);
  font-size: 12px;
  color: var(--foreground);
  opacity: 0.7;
}

@media (max-width: 560px) {
  .main {
    padding: 32px 20px 48px;
  }

  .page-header h1 {
    font-size: 32px;
  }

  .link-row {
    grid-template-columns: 1fr;
  }

  .pdf-library li {
    grid-template-columns: 1fr;
  }

  .pdf-item-actions {
    justify-content: flex-start;
  }
}